Vitamin E is helpful in nonalcoholic fatty liver disease.
Vitamin D deficiency is widely prevalent in the Western world.
The effect of folic acid supplementation on colon cancer in average-risk subjects is controversial. VITAMIN A Vitamin A and Cancer1
Results of the studies examining effects of vitamin A on cancer risk have been conflicting.
While some RCTs have shown no effect, others have actually demonstrated an increased risk of lung and prostate cancer in men receiving vitamin A supplements.